docs: def create_snapshot(self, volume_id, notes='', **kwargs):
          """Creates a snapshot on the given block volume.
  
          :param integer volume_id: The id of the volume
          :param string notes: The notes or "name" to assign the snapshot
          :return: Returns the id of the new snapshot
          """
  
          return self.client.call('Network_Storage', 'createSnapshot',
                                  notes, id=volume_id, **kwargs)